No Injector Pulse Or Spark

A few weeks ago I posted about my problem with injector pulse. You can access a code by jumping 2 terminals together. Have checked the injectors and they're getting a pulse as normal so they now work fine post airing cupboard for the apexi. Spark was tested using an HEI spark tester and injector pulse monitored with a noid light. Home-> Forums-> Electrical-> No spark or injector pulse. Cranks- No Spark, No injector pluse, No codes New head, new timing components, it has been timed and I just replaced the cam position sensor. The first time I ran into one of these, I mistakenly replaced the engine computer in an attempt to fix the no injector pulse condition. Used a noid light to test each injector clip, no dice. Try starting it at half throttle. 4 No star ,No injector pulse,good spark using your pull down by pass tes. ordered ecm programmed to my vin # installed and performed passlock reprogram. ENGINE SPEED SIGNAL. I have no spark or fuel pulsing when cranking. Spark on some spark plugs can be caused by faulty ignition coil, spark plug wires or the plugs themselves. Checked pick up coil resistance, checked out fine. If you do, it loses injector pulse, verified by noid light. After a period of time it will then start. [FIXED] Explorer no spark - confirm my diagnosis × Help us help you. My local shop replaced the ignition module-no luck. i get no pulse at the injectors, only two pulses at first but then nothing else. I have a 1991 mustang gt automatic transmission. However, the module that controls this feature can fail and then we have no spark and no injector pulse/signal. I have a few problems. Fuel pressure is 64 PSI when key is turned on, about 60 PSI while cranking. Plenty of spark under crank position. He replaced the crank sensor, module, cam sensor cap and tried a computer (it was a open box cardone unit). 822 embedded code is the capability to use two inputs and two outputs for ignition. constant reading on injector conectors is good but no pulse reading when starting. Has spark but no fuel. So no CKP pulse and no spark and no injectors, or bad EDIS-6 and no spark and no injectors. Fuel injectors are usually powered directly by a fuse and then grounded by the engine computer. Did you check the spark on this engine? If there is no spark as well, the pick-up coil in the distributor is the most likely problem. ANd i take the injector out and test it, It spark fuel. I do not have to do anything to make it start, it just starts when it is ready. check to see if you are getting signal from the crank position sensor, you might have a crank position sensor or cam sensor out. I believe that is the dist module. This tells the ECM how fast the engine is turning. 5L the Engine crank over OK, but there is no injector pulse and no spark. Only if the plugs in your car now are in VERY bad shape (like with a hundred-thousand miles on them). Replaced cam and crank sensor, and timing belt is good and time is correct. The fuel injector drives will max out at 5 amps each, enough to drive one low-impedance (or 4 high-impedance) injector per bank. Please help! Difficult problem, could be something simple? I have a Nissan Sentra 99 that will not start, was running great before, checked fuel pressure, its great, theres spark in spark plug, all fuses and relays are ok, but no pulse to injectors, nothing at all. The fuel injector harness has power but no ground (signal) when cranking. CAM SENSOR has being replace but yet still injector wont spit fuel, when car left without cranking for 20 minutes and you try to crank, injector spit out once and wont spit again, till have to wait, according to client, ECM has being replace, but yet still car wont start, all earth point was checked and proof valid. Cranks- No Spark, No injector pluse, No codes New head, new timing components, it has been timed and I just replaced the cam position sensor. Crank Sensor Test -No Spark No Start Tests (GM 4. Please help! Every possible part I could test passed just wondering if it is an ECM problem?. and if there is a test procedure for it before i throw money at it. I have spark, fuel at the fuel rail and it will crank over with no problems, just will not pulse the injectors. That would show a flicker if the fuel injector was pulsing, correct?. Most likely a module or pick up issue. I have a 1988 Fod E250 that will not start. It decided to die in a parking lot after being shut off. Spark would occur then stop, (intermittent spark). The owner switched the ignition module over to tbe 86-87 module. It doesn't pulse at all when cranking, but as soon as you stop cranking, it kicks on once. If I recall correctly, all the injectors are powered from 4 red wires coming off the main relay, and there was no power coming from the line feeding that cylinder. He calls me up and tells me that the car won't start, no spark or injector pulse. I'm not saying that it may not work but in my situation it did not. I hooked up a Snap On MT2500 Scanner and wound up getting no rpm's on when checking the crank sensor. Have pulled and tested spark plug for spark. I orded it and installed it and it ran great for about a year then died on me. The PIP signal level needs to be above 6. A bad MAP sensor is on the top of my list. The fuel injector drives will max out at 5 amps each, enough to drive one low-impedance (or 4 high-impedance) injector per bank. still have spark. ok so i recently bought a 04 gto from a tow yard that the top end of the motor was taken apart i bought a used intake manifold head were n the trunk no key got a key from the dealer followed the coding of the key the lock light in the dash went out we put the car back together and i have no spark or injector pulse the grounds on the heads are in place new crank sensor can anyone give me any. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc. The way injectors work is they receive constant 12v and are GROUND activated. i have pulled plugs to make sure the injectors arent pulsing and there dry after multiple attempts still dry then through lotsa looking and testing figured out there not pulsing i read in the manual this line. Checked pick up coil resistance, checked out fine. You can access a code by jumping 2 terminals together. No pulse width modulation (PWM) to limit injector current. No Start Test 1: Checking for Spark. i find out, the fuel injector didnt spark any fuel at all. -----Will not flash codes. 12 have no codes other than MAP sensor and that is because I broke it and need a new one. The injectors get 12v constant and then when cranking goes down to. Fuel pump ok-it primes and has pressure. 5 frontier 4 Answers. Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by Rewq246, Apr 27, 2017. I have an 06 Nissan Titan 5. I have spark, fuel at the fuel rail and it will crank over with no problems, just will not pulse the injectors. 2005 NISSAN ALTIMA SE-R NO SPARK NO INJECTOR PULSE PAUSIBLE CAUSE? lacking spark and injector pulse, If it is out of time then there will be no spark or pulse. I drove the car and tuned it some, it was running good for a car that has sat close to five years. Module is in good. that would be sweet. does distributor actually turn when you crank - check you still have power to coil when you crank -. Do this as a temporary measure to eliminate it as a possible problem source. Now it cranks, but won't start. So we have disabled the vats, triple checked all earth grounds, have cranking 12v, tried different cylinders, have fuel pressure at rails, computer was put into to a different car to drive a car onto dyno and taken back out, any. The PIP sensor supplies the timing pulse to trigger the TFI and. put a noid light on them and they have juice. It was running fine. I replace crank and cam sensors and the computerI dont know where else to go with this. i have 12v at the coil. The car now has neither spark or injector pulse now. Checked all 4 injectors with DVOM, threshold I believe is 13. So I went in and tested the pins directly at the ecu by probing The injector output pins 51,52,60, and 61. The injectors are firing even when the car won't start. When I crank I get no spark or injector pulse. I have a 03 Wrx that has no spark and no injector pulse. ) Spark at spark plug, but no start. I’m not sure of the exact location of the module, on the E28 chassis. CAM SENSOR has being replace but yet still injector wont spit fuel, when car left without cranking for 20 minutes and you try to crank, injector spit out once and wont spit again, till have to wait, according to client, ECM has being replace, but yet still car wont start, all earth point was checked and proof valid. There is battery voltage at both terminals at each of the red and blue wires on each injector to earth and the noid light shows nothing when cranking. Do this as a temporary measure to eliminate it as a possible problem source. Have spark-compression-good fuel injector-power to injector, but no injection pulse to this injector. but still just cranks, no spark, no injector pulse. ohm check coil ok. is directly to block. the injector harness ground is grounded and engine to firewall is grounded and battery neg. Im stumped Any ideas on what to change. Any idea why there is either no spark or no fuel to fire engine? Needless to say I have no confidence in the mechanic!. hey guys I'm building a 95 i6, i built the motor and did a 5 speed conversion but i have no injector pulse, fuel pressure is good, timing is good,i have fire at the plugs, compression is good, I'm using the auto trans computer with the neutral safety switch set to neutral, any ideas, what tells the injectors to fire?. no injector pulse, so no fuel going into engine. No Start Test 1: Checking for Spark. Well with a new DME Relay there was still no injector pulse. No injector pulse maintenance & nonperformance. Hey all i have a vr caprice that runs on petrol/gas me and the boys were working on the car we had forgot to undo the + terminal on battery caused a lil spark while undoing the alternator and have lost injector pulse and will not start on gas. 1995 Dodge Dakota 5. The injector pulse is from the PCM. I have seen a good spark and no injector pulse on fords, honda, and holens(gm) and all have lead to a pcm ground, but check its voltage as well. 7ms during the rest of the cranking So engine has spark, injector pulse is there but something is still not right. The cam sensor’s job is to sequence the ignition and injector firing so that each "pulse" of the crank sensor is synched to the correct cylinder. was the best 40 bucks i spent but definitely try to rule out the simpler stuff first. The fuel injector drives will max out at 5 amps each, enough to drive one low-impedance (or 4 high-impedance) injector per bank. I hooked up a Snap On MT2500 Scanner and wound up getting no rpm's on when checking the crank sensor. Re: no spark no injector pulse Don, i checked with a noid light and there is fuel pressure. 4l back together no spark - Ford Modifications Website. The vehicle being tested is a 2007 Hyundai Santa Fe 2. I'm ready to tow it to a bmw shop, but it just seems like it should be something very simple. Checked for spark no spark. I used the following for my three wire hookup to the engine harness from the AAW accessories connector: dark blue fuel to gray fuel power feed on harness. Im stumped Any ideas on what to change. getting a crank signal but no injector pulse or fire from coils #3 and #1 have no spark and no injector pulse on 1 through 4. 7 TBI for my son with a blown engine (rod bearings beaten paper thin and clattering), they had just put a new Bosch fuel pump in it and done some jacking around with the fuel pump relay wiring- probably because it had no oil pressure. You may have to remove the spark plugs to let them. I have checked the speed sensor, reference sensor, cyl. corrosion would carry enough milliamps to activate voltmeter, but not circuit to run fuel pulse. Re: 98 Wrangler, No Spark, No Codes The details above show that your crank/cam sensing is working fine. None of the. Car cranks and has spark. hello im having trouble with my 2002 f150 has no spark or injector pulse replaced fuel pump checked all fuses and relays swapped crank sensor and cam sensor please. In this case a DRB III. ED falcon no spark or injector pulse. Maybe it's a guess? Because it won't stay running? Fuel pressure is important. Anyone know how to back probe injector wires going into PCM to determine if there is power at the PCM or not? If power- bad PCM injector driver/ if no power open circuit to PCM. It doesn't pulse at all when cranking, but as soon as you stop cranking, it kicks on once. By continuing to use this site you consent to the use of cookies on your device as described. The injectors dont get a pulse and the spark plugs dont get power. I have another DFI module but not sure if this is any good either. Fuel pump is providing good pressure. But we've got no spark and no fuel on the spark plugs. Will not run with or with out MAS plugged in or not. Has spark but no fuel. So things to consider: If you have voltage on one side than the other side is being grounded out by the ECU in phase. I also have spark, but my plugs are black and soaked with fuel. As above has spark no injectors. Module takes a thin 5. So I jumped the 30 and 87 terminals where the starter relay goes with a starter switch just to see if it would run. Next day just turns over) Now it just turns over and no start. The vehicle being tested. Tach in +12V via two wires, one ignition power, one main. I have spark, but now we have finally discovered I am not getting any fuel into the cylinders. Both are very popular for failure. Car question: My Grand Caravan SE suddenly died while driving and phoning around, automotive garages are asking too much to have it fixed. any:confused. and if there is a test procedure for it before i throw money at it. We attempted to connect the ALDL, but could not communicate with the computer, so a new ECM. Injectors click with 12V applied. 75 volts to trigger the TFI module. Hi folks, was hoping to fire up my ls3. ED falcon no spark or injector pulse. I have seen a good spark and no injector pulse on fords, honda, and holens(gm) and all have lead to a pcm ground, but check its voltage as well. I purchased this car a few weeks ago, in non running condition. ) Coil weak or intermittent - you should see 3/8" fat blue spark with a good coil 3. Do the injectors fire and spray fuel into the engine. No spark, no injector pulse: 1 Verify voltage to the coil. i hope this is in the right area, i need some advice. I am having a misfire in cylinder no. It has good spark, good fuel pressure around 50 psi and it doesn't drop when cranking. There is spark but no injector pulse. ) Moisture inside distributor – remove cap, dry off & spray with WD40 B. My internet went out. 0l ztec no start/weak injector pulse (sometimes)/good spark/no code Hello, i have a 2000 ford focus 2. Fuel Injector Replacement Service What is a fuel injector and how does it work? A fuel injector is a fuel metering device that sprays atomized droplets of fuel in a specific pattern into the engine’s intake manifold or directly into the combustion chamber. In other words, for example. I had it towed to my personal mechanic because I was moving and didn't want to tow it a third time if I couldn't figure it out the issue. I also have spark, but my plugs are black and soaked with fuel. already changed pcm with my friends daily driver pcm, changed complete injector harness. I have spark, fuel at the fuel rail and it will crank over with no problems, just will not pulse the injectors. don't want to pay unless advice helps to FIX the car. Now it cranks, but won't start. However, it is quite common to see a no injector pulse condition with good spark. Is there a way that i can check the CAS other than that? like OHM or voltages as i turn it?. I swapped in a spare ECM and still no spark or 12 volts at injectors. hello im having trouble with my 2002 f150 has no spark or injector pulse replaced fuel pump checked all fuses and relays swapped crank sensor and cam sensor please. Other times it starts right up. was the best 40 bucks i spent but definitely try to rule out the simpler stuff first. I have no fire ,no injector pulse and the code reader shows no MIL. Tried it, no luck took a quick check for spark and there's no spark. Hello to all I need help! I have 2005 nissan maxima SE 3. fuel pump on runs and puts out pressure up to the throttle body the only problem is there is no injector pulse. 1991 this make you OBD1. 2005 Chevrolet Impala 3. It decided to die in a parking lot after being shut off. reconnected. Often if there is no crank signal there will be no injection pulse, probably no spark, and sometimes no fuel pump operation during crank. The fuel injector drives will max out at 5 amps each, enough to drive one low-impedance (or 4 high-impedance) injector per bank. I am having a misfire in cylinder no. I swapped in a spare ECM and still no spark or 12 volts at injectors. you may be getting pressure but no volume from the fuel pumpsounds weird but they are 2 different things. will run with gas splashed into intake until gas used up. This morning, using module #1, I cranked the engine while someone wiggled the ign module connectornothing happened. New distributor new coil new injector new brain new fuel pump new fuel filter but still no pulse to injector. With some fresh plugs a little transmission fluid in the cyl. The car had a dead battery, i replaced the battery and discovered the pcm was dead, (no fuel pump, no gas gauge, etc. Diagnosing a clogged injector is not always easy because the symptoms act similar to low compression or an ignition problem, such as a bad ignition coil, a broken spark plug wire, a bad spark plug. It always cranks but not start when cold. wmv With this video I want say thanks to you PAUL DANNER I fixed this chevy venture 02 3. However, unless you pull all the injector connectors off at the same time (at least all the ones that share the same transistor) you'll read 12 back feeding through the other injectors and their dropping resistors. my sister brought a ebII 4. cant go through my senior year without a car. The engine will run if I spray starter fluid into the throttle openings and then crank it. Thing's I have checked. If the injectors appear to be working, but the engine will not start, the engine may be flooded. No injector pulse! Im thinking the pcm is bad but want a second opinion, the pcm has been fried before due to the battery being jumped wrong. ED falcon no spark or injector pulse. 93 chevy no fuel injector pulse but if the module was bad he should have no spark. 4 No star ,No injector pulse,good spark using your pull down by pass tes. Also the green. The PIP signal level needs to be above 6. even thought it was the igniter but it wasn't. No injector pulse or spark?? I have an 04 wrx that I bought as a project. With this video I want say thanks to you PAUL DANNER I fixed this chevy venture 02 3. Both are very popular for failure. hey guys I'm building a 95 i6, i built the motor and did a 5 speed conversion but i have no injector pulse, fuel pressure is good, timing is good,i have fire at the plugs, compression is good, I'm using the auto trans computer with the neutral safety switch set to neutral, any ideas, what tells the injectors to fire?. A bad MAP sensor is on the top of my list. after 2 or 3 seconds as it did before. i purchased the car and had heads rebuilt installed with new gaskets and all surfaces machined. Seems to run OK if it starts. ) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more. No spark (no power at coil), No injector pulse (No power to injectors), No fuel pressure, No AC clutch power, No key on Check Engine light. Jim Grant's Tech Tips '97 Chevy Astro, No Injector Pulse. @Wentwest I tried your suggestion of removing individual injector connectors to no avail. Injectors arent firing. Checked injectors 3-4 ohms at each. Q: We have a ‘97 Chevy Astro van in the shop that wouldn’t start. 6 liter that has intermittent start issues. Home-> Forums-> Electrical-> No spark or injector pulse. Thing's I have checked. Mechanic replaced spark plugs and now has replaced the fuel injector assy and still won't start. I checked ground by ecm and starter solenoid and there ok and clean. check engine lite is on key on engine crank. Fuel pressure checks out. The injectors, or pulses to them, are definitely the problem. any advice would be greatly appreciated thanks. If I recall correctly, all the injectors are powered from 4 red wires coming off the main relay, and there was no power coming from the line feeding that cylinder. What I have done: Verified voltage at coil and ICM at distributor, key ON and START, voltage good. ) MSD, Crane, or other ignition box if present - Bypass it and return to stock configuration if possible. How to check fuel injector pulse using a noid light This is a awesome test because it can be done very fast using a very inexpensive tool called a Noid light. ) Spark Plug wires E. Have checked the injectors and they're getting a pulse as normal so they now work fine post airing cupboard for the apexi. Plug back in, no pulse to injectors. If there is no spark, or weak spark, verify the following: • 12 Volt switched ignition power to the coil. I replace crank and cam sensors and the computerI dont know where else to go with this. I have do have spark plug fire, fuel to the rail 45 to 60 lbs but no injector operation. I feel like junking the darn thing but now i have to much money in it. That would show a flicker if the fuel injector was pulsing, correct?. they said no fuel injector pulse. Ok have checked CAS connector looks ok. I also have 40+ PSI at fuel rail. I used the following for my three wire hookup to the engine harness from the AAW accessories connector: dark blue fuel to gray fuel power feed on harness, orange BAT1 to orange constant power, and pink IGN1 to pink ignition on harness( this also says. No flashes from the injector circuit when cranking the engine would tell you the PCM is not pulsing the injectors. 7 fuel injector. au Welcome to the Australian Ford Forums forum. We just did the JDM engine swap and all is hooked up but I'm getting no injector pulse. Now it cranks but no injector pulse no spark and only fuel delivery on prime up. I have a 1988 Fod E250 that will not start. heres what i was able to check on the fly while in the rain at my brothers. We have narrowed it down to the fact that there is no injector pulse but cant seem to figure out the biggest question- WHY?!!?. The injectors went full flow when I replaced the ICM with the Key ON, accidentally. That was a month ago. When you first turn the vehicle on the spark plugs sends a single spark, So it must be connected properly. Auto shutdown and fuel pump relays send power when I ground dark blue. 1992 Dakota 3. If you do, it loses injector pulse, verified by noid light. they're pretty good but it's almost impossible to find a solid state device of any type that goes for 20+ years without some problem. Getting 12v to injectors, but no pulse - removed and inspected dme, no visible signs of water/dampness, no obvious burnt electricals. 2004 Dodge Grand Caravan SE 3. Page 1 of 2 1 2 Next > Rewq246. I check the following items, crank sensor, cam sensor and wiring, I also check all the power input and grounds going to the ECU fuses all check OK. The only injector plug that gets a pulse is on cylinder 1. The module does send a signal to the ECM for injector pulse but i have seen the modules be bad and have no spark but still have injector pulse. i took my car to the shop, they test it for me. l check on scanner no fault code , check all wire on ecu. Fuel pump is providing good pressure. A bad MAP sensor is on the top of my list. wmv With this video I want say thanks to you PAUL DANNER I fixed this chevy venture 02 3. I also have 40+ PSI at fuel rail. I hooked up a fuel pressure gage and it is perfect. I have a 1990 Eagle Talon Tsi having issues with injectors. you now need to check for 12 volt power, and signal to the coil, also be sure all you timing marks are correct, if you have no spark, unplug one of the injectors and using an led test light check for injector pulse power across the two terninals while cranking, if you have no injector pulse then you could have a problem with the ignition passlock system, or key decoder. What I do not have is the ground pulse to fire the injectors. As for the idle control valve, if the valve were completely closed, the engine may not start. Have any of you guys ever seen this scenario with no spark or injector pulse?. hi i have a celica st20 it has a 5s-fe motor wouldnt start it has no spark and no injector pulse i replaced the distributor and ignitor any sugestions on what else it. PULSE condition. hey guys I'm building a 95 i6, i built the motor and did a 5 speed conversion but i have no injector pulse, fuel pressure is good, timing is good,i have fire at the plugs, compression is good, I'm using the auto trans computer with the neutral safety switch set to neutral, any ideas, what tells the injectors to fire?. I have replaced the crank sensor, ohm tested all the wiring, timing is good, tried a new ecu, still no start. However, it is quite common to see a no injector pulse condition with good spark. i dunno,,,. Also, no power to the fuel pump. You can access a code by jumping 2 terminals together. Any suggestions for further testing? Thanks CRAIG. 1995 ford: no spark or injector pulse, all of the fuses Justanswer. I used the following for my three wire hookup to the engine harness from the AAW accessories connector: dark blue fuel to gray fuel power feed on harness. Have any of you guys ever seen this scenario with no spark or injector pulse?. problem start nissan 2006 2. Checked injectors 3-4 ohms at each. 3 ms which is pretty good for a big injector. I am now checking it and found it has no spark and no injector pulse. Also, I did test by myself. I purchased this car a few weeks ago, in non running condition. no start,no spark,no injector pulse. After that, with that module, anytime the key was switched ON, the injectors would go full bore. No start, spark but no injector pulse. If the spark is erratic you need to look closely at the crankshaft position sensor. Went to do a break in and it has no spark and the injectors aren't firing (confirmed with noid light). No Injector Pulse. I replace crank and cam sensors and the computerI dont know where else to go with this.